Steam for Linux

Loaded Dynamite Jack, opened the overlay and was typing and everything paused for a moment. The overlay then closed and I could not re‐open it, yet the game persisted.

I played for a bit, got two achievements after the first level and it caused the game to exit fullscreen and enter maximised bordered window mode, and once the achievements vanished off the screen it returned to fullscreen again. very weird.

I'm still having this issue in all games I've tried so far. I'm using Ubuntu 12.10 x64 with Unity.

The Steam Overlay was causing similar issues (on Steam chat popups), so I disabled it globally in Steam's preferences, but achievement popups still either minimize the game (as in TF2) or pop the game into windowed mode (as in And Yet It Moves, Superbrothers: Sword & Sworcery EP). Depending on the game, I may be able to continue just fine (TF2 will regain focus just fine) or have to quit the game to get it back into fullscreen mode (AYIM).

I have this issue too. Linux Mint 13 64 bit, with MATE window manager. The game exit and re-enters fullscreen, but loses focus and the only thing I could do was reboot. Happened every single time I got a steam achievement; tested games: Dungeons of Dredmore and Space Pirates and Zombies.

Also happens to me in TF2, running Arch Linux with XFCE/Xmonad. As a tiling WM I can keep TF2 force-maximized, but the popup still steals focus. I'll report back if I can find a setting to prevent new windows from taking the focus, but I'd rather leave that the way it is so I can still use it normally.